Stop-motion for printing-presses.



No. 723,107.' PATRNTIIIJ MAR-.17, IOOS..

I O. R. WILLIAMS.l 1

STOP MOTION POR PRINTING PRESSES.

APPLICATION PILBD'JULY 18, 1902.

I :No MODEL. 2 SHERTS-SI1IIRT 1 Ivy-l No. 723,107. PATENTED MAE-1211903.. G. R. WILLIAMS. v

x STOP MoTmN POP. PRINTING' PRESSES.

` .APPLomm'N NLD mulls, 1902.

.No Movm.. .z SHEETS-snm- 2,.,

UNITED STATES GEORGE R. WlLLlAMS, OF BROOKLYN, NEW YORK, ASSIGNOR 4TO ECONOMIC. MACHINE COMPANY, OF NEW YORK, N. Y.

PATENT FFICE.

. STOP-MOTION FOR PRINTING-PRESSES.

SPECIFIQATION forming part of Letters Patent N o. 723,107, dated March 1'?, 1903.

I l Application filed July 18, 1902. Serial No. 116,057. (No model.)

To aZ-Zwhom` tummy concern: u Be it known that I, GEORGE R. WILLIAMS,

` a citizen of the United States, residing at New York, in the borough of Brooklyn, in the county of Kings and State of New York, have invented new anduseful'lmprovements in Stop-Motions for Printing-Presses, of which the following is a specification.

This invention relates to an automatic stopmotion for printing-presses'and other machines for operating upon paper and other material.

\ to the form.

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In the accompanying drawings, consisting of two sheets, Figure l is a side elevation of the feed end of a cylinder-press, showing a stop-motion attachment embodyingthe invention applied to the press. enlarged fragmentary transverse section throughthe press, showing the detector devices in elevation. Fig. 3 is an enlarged sectional elevation showing one of the detector devices and associated parts. Fig. 4 is an end View of the parts shown in- Fig. 3. Fig. `5 is an enlarged end View of the stop mechanism.

Like letters of reference refer to like parts in the several figures. y i

In the present application the invention is shownand described in connection with a bedand-cylinder` printing-press; but the invention is also applicable to othertypes of printing-presses and other machines. Y

The stop mechanism may be arranged to trip thecylinder, shift the belt, or apply the brake, either or all; but it is only necessary to stop the press when the sheet sticks to the form, and in thepresent application a stop mechanism is employed which only shifts the belt and applies thebrake.

A represents the stationary frame; B, the feed-board; C, the impression-cylinder;C',

Fig. 2 is an' the reciprocating bed for the printing-form, and O2 the delivery-cylinder for taking the printed sheets from the impression-cylinder and carrying them to the discharge mechanism. (Not shown.) D represents the footboard, E the hand-lever for shifting the belt in stopping-and starting, and E the foot-spindle for applying the brake. These parts are all of ordinary construction. 6o

The stop mechanism shown in the drawings is similar to that fully described in my application for United States Letters Patent liled March 18, 1902, Serial No. 98,738, and is, brieystated, as follows: F represents a rockshaft which is journaled in suitable bearings f beside the printing-press and is connected with the hand-lever E and the brake-spindle E', so that by rocking the shaft the belt is thrown off and the brake applied. The shaft 7o is -connected to the hand-lever by an arm f' androd f2 and to the brake-spindle by an arm f3 and rod f4. The rock-shaft is rocked by a weight G, which is adj ustably secured to the outer end of the weight-lever g, which is ful- .crumed at its inner end on a fulcrum-pin g',

projecting from a suitable standard g2. The Weight-lever is connected intermediate of its ends by a link g4 with the outer end of an arm g3, fixed on the rock-shaft. The rock- 8o shaft is controlled or held from movement by a device which in the present instance is au electrically-releasable latch controlled by a detector mechanism which is operated to move the latch and release the stop mechanism when a sheet or a portion of a sheet sticks to the printing-form.

H represents the latch, h an electromagnet,

and h the armature which is connected to the latch and operated by the magnet. These 9o Vparts are of the usual construction and are located in a box h2 on a forwardly-projecting portion of a standard h3. h4 represents a rockfarm secured to the rock-shaft adjacent to said standard hS-and' connected with the 95 upper part of the latter by a toggle-joint consisting of a lower link h5, pivoted to thc rockarm, and an upper link h, pivoted to thev standard. The upper link is provided below the joint of the toggle with a bolt-socket in roo which is arranged a spring-pressed catch-bolt hl, adapted to be engaged by the latch H.

When the latch is lifted by the magnet, the catch-bolt is released and the weight G rocks the rock-shaft to throw off the belt and apply the brake. y

` The detector mechanism is arranged and constructed as follows: I represents detector devices or lingers which are arranged adjacent to the reciprocating bed, so that in the movement of the latter the printing-form is carried beneath the detector devices. There are preferably a plurality of the detector devices located in the space between the bed and the discharge side of the impression-cylinder and so spaced that a detector device is opposite to each longitudinal depression or space between the raised portions of the printing-form. In the construction shown the detector devices or fingers are hung to swing longitudinally of the bed on pivots i,

secured to a su orting-bar t', which extends transversely over the reciprocating bed and is secured at its opposite ends in any suitable manner to the sides of the press-frame. The detecter devices are so proportioned that the lower edges thereof, which are preferably curved or rounded, project into the spaces formed between the raised portions of the printingform slightly below the plane of the printing-faces or raised portions of the form. If a portion or the whole of the sheet adheres to the printing-form, so as to bridge any one of the spaces between the raised portions of the form, it will in the movement of the bed engage and swing the detector device or devices which stand in the path of.movement of the paper. The detector devices do not contact with the form and are not operated except when the sheet or a portion of a sheet sticks to the form. When any one of the detector devices is oscillated, it operates to close an electric circuit, in which the electromagnet h for the releasing-latch is included, so that the magnet is energized and the latch lifted. The electrical connections are represented in Figs. l, 2, and 4, and are as follows: j represents a battery; j', a wire leading from the battery to the detector devicesgjz, a wire leading from the detector devices to the elec- `tromagnet, and j'the return-wire leading electrically connects the contact-springs and `closes the battery-circuit, so that the electromagnet attracts its armature and moves the latch H to release the stop mechanism, which Vof mechanical devices.

operates, as before described, to stop the press.

Various other devices for closing the magnet-circuit to release the stop mechanism will readily suggest themselves and come within the scope of the present invention. rlhe stop mechanism can also be released by the detector devices through the instrumentality Means for mechanically releasing the stop mechanism are not described herein, but form the subject-matter of another application. 4

I claim as my inventionl. The combination with a printing-press or the like, of a stop mechanism therefor, and a detector device which controls said stop mechanism and which is operated by the engagement therewith of the material when it sticks to the form, substantially as set forth.

2. The combination with a printing-press or the like, of a stop mechanism therefor, and

a detector device which controls said stop mechanism and which is arranged adjacent to the printing-form and is operatedV by the material sticking to the form, substantially as set forth.

3. The combination with a printing-press or the like, of a stop mechanism therefor, ay movable detector device controlling said stop mechanism and arranged adjacent to the printing-form and adapted to be moved by material sticking to the form, substantially as set forth.

4E. The combination with a printing-press or the like, of a stop mechanism therefor, a releasing device for said stop mechanism, a movable detector device arranged adjacent to the printing-form and adapted to be engaged and operated by material sticking to said form, and operative connections between said detector device and said releasing device, substantially as set forth.

5. The combination with a printing-press or the like, of an electrically-releasable stop mechanism therefor, and a detector device' which controls said stop mechanism and which is operated by the engagement therewith of the material when it sticks to the form, substantially as set forth.

6. The combination with a printing-press or the like, of a stop mechanism therefor, an electrically-operated releasing device for said stop mechanism, and a detector device controlling said releasing device and arranged adjacent to the form and adapted to be operated by the material. sticking to the form substantially as set forth.

7. The combination with a printing-press or the like, of a stop mechanism therefor, a detector device pivotally supported adjacent to the printing-formV and adapted to be oscillated by the material sticking to the form, and operative connections between said detector device and said stop mechanism substantially as set forth.

8. The combination with a printing-press IOO IIO

I l I lated by the material sticking to said form, an

electric circuit controlling said electrical de- I5 vice, and contacts for said circuit adapted to be engaged by said detector device to close said electric circuit, substantially as set forth.

Witness my hand this 15th day of July, 2o

GEORGE R. WILLIAMS.

Witnesses:

GEO. C. KIMBALL, CHAs. H. LAMB. 

